ReciQues-03.pdf_, filename=_ReciQues-03.pdf_, filename=_ReciQues-03.pdf_, filename=_ReciQues-03.pd

ReciQues-03.pdf_, filename=_ReciQues-03.pdf_, filename=_ReciQues-03.pdf_, filename=_ReciQues-03.pd

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Chem 109 Recitation Problems – Chapter 3 1 1. Na 2 SO 4 contains A. only ionic bonds. B. only covalent bonds. C. both ionic and covalent bonds. D. neither ionic nor covalent bonds. 2. Which of the following could be an empirical formula? A. C 3 H 8 B. C 2 H 6 O C. C 4 H 8 O 2 D. A and B E. B and C F. A and C G. All of the above can be molecular formulas. H. None of the above could be a molecular formula. 3. Which of the following could be a molecular formula? A. C 3 H 8 B. C 2 H 6 O C. C 4 H 8 O 2 D. None of the above could be a molecular formula. E. All of the above can be molecular formulas. 4. Which two of the following picture would best represent the Law of Multiple Proportions? (a) (b) (c) (d) a. (a) and (b) b. (c) and (d) c. (a) and (c) d. (b) and (d) e. (a) and (d) f. (b) and (c)
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Chem 109 Recitation Problems – Chapter 3 2 5. Balance the following reactions. NaN 3 (s) ! N 2 (g) + Na(s) Fe 2 O 3 (s) + C(s) ® Fe(s) + CO
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Unformatted text preview: 2 (g) 6. What is the molecular formula of a substance whose empirical formula is C 2 H 6 O if the molar mass of the substance is 138.2 g/mol? (8 pts) 7. What is the mass percent of each element in C 3 H 6 Br 2 ? (6 pts) 8. What is the molecular formula of a compound made of carbon, hydrogen, and oxygen knowing the molecular mass of the compound is 180.2 g/mol and the combustion analysis of 3.9644 g of the compound produced 5.809 g CO 2 and 2.378 g H 2 O Chem 109 Recitation Problems Chapter 3 3 Naming Give the name or the formula of each compound. 1. iron (II) chloride 7. AlPO 4 2. calcium perchlorate 8. H 2 CO 3 3. dinitrogen monoxide 9. Cr 2 S 3 4. hydrochloric acid 10. CBr 4 5. sulfuric acid 11. HF (s) 6. butane 12. HF (aq) 13. H H H H H H | | | | | | H C C C C C = C H | | | | H H H H...
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